Mercedes Mullins
The fuel filter in a 99 Ford Mustang is located in front of the gas tank. It is recommended that you change the fuel filter every 24,000 miles, or 30,000 miles, to prevent clogging and ensure optimal performance and fuel efficiency. Replacing the fuel filter is a simple process that can be done in under 15 minutes with basic tools, such as a screwdriver and a fuel line disconnect tool. Before starting, it is important to relieve fuel pressure and depressurize the fuel system to avoid any spills.
| Characteristics | Values |
|---|---|
| Fuel filter location | Directly above the rear differential, on top of the fuel tank, towards the inside of the car |
| Fuel filter replacement | Recommended every 24,000-30,000 miles or when clogged |
| Fuel filter replacement tools | Jack, jack stands, 5/16" filter quick disconnect tool, screwdriver, drain pan, 5/16" nut driver |
| Fuel filter replacement procedure | Depressurize fuel system, remove old filter, install new filter, check for leaks |
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What You'll Learn
Fuel filter location
The fuel filter on a 99 Ford Mustang is located in front of the gas tank. To access the fuel filter, you will need to raise the rear of the car. Place a jack in front of the differential and slowly raise the rear axle. Once the car is at the desired height, place two jack stands on the rear axle and lower the car onto them to secure it.
Before attempting to locate the fuel filter, it is important to relieve fuel pressure. This can be done by unplugging the electrical connector from the fuel cut-off switch, which is located in the trunk on the driver's side. Then, start the vehicle and let it run until it dies. Alternatively, you can pull the fuse that goes to the fuel pump, run it for a little while, shut it off, and then start it back up until it no longer starts.
Once the fuel pressure is relieved, you can proceed to locate and remove the fuel filter. The fuel filter is situated directly above the rear differential. To remove it, you will need to first remove the two plastic end covers, undo the screw securing the filter, and then remove the fuel line from both sides using a quick disconnect tool. It is recommended to have a rag or drain pan handy, as some fuel may drain out during this process.
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Fuel filter replacement tools
Fuel filter replacement is a necessary part of car maintenance. The fuel filter in a 1999 Ford Mustang is located on the rear of the vehicle, on top of the tank on the side facing the front of the car. Before attempting to replace the fuel filter, it is important to depressurise the fuel system. This can be done by locating the Schrader valve behind the alternator, removing its cap, and pressing on it with a small flat-head screwdriver. Alternatively, the fuel system can be depressurised by accessing the inertia switch in the trunk on the driver's side and unplugging the connector. Once the fuel system is depressurised, the car should be lifted to access the fuel filter.
Now, onto the tools. To replace the fuel filter in a 1999 Ford Mustang, you will need a jack and jack stands to lift the car. Additionally, a fuel line disconnect tool is required to remove the fuel lines from both sides of the filter. The size of the disconnect tool may vary, with some sources recommending a 5/16" tool and others suggesting a 5/8" tool. It is important to use a tool that fits securely around the line. A nut driver, such as a 5/16" size, can be used to loosen the retaining clamp. Other tools that may be useful include pipe extraction pliers, hose pinch-off pliers, and a drain pan to catch any spilled fuel.
It is important to note that working on a fuel system can be dangerous, and proper safety precautions should be taken. It is recommended to wear protective gear, such as gloves and eye protection, and to have a fire extinguisher nearby. Additionally, it is crucial to ensure that the area is well-ventilated to prevent the buildup of flammable fumes.
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Fuel system depressurisation
There are a few methods to depressurise the fuel system on a 1999 Ford Mustang. One way is to locate the inertia switch in the trunk on the driver's side. This switch is a black plastic box with orange on top. Remove the trim by undoing the plastic connector and pulling back on the cloth liner to expose the switch. With the car running, unplug the inertia switch connector, and the car will run for a few seconds before shutting off. At this point, the fuel system is depressurised.
Another method is to remove the gas cap and unscrew the Schrader valve on the fuel rails. You can also locate the Schrader valve behind the alternator, remove its cap, and press on it with a small flat-head screwdriver to release the pressure.
If you have access to the fuse box under the hood, you can pull the fuse, and then start the car, which will cause it to die and depressurise the fuel system. Alternatively, you can simply let the car sit for a few hours to allow the fuel pressure to bleed down naturally.
Once the fuel system is depressurised, you can proceed with replacing the fuel filter. It is recommended to have the car lifted with the front wheels on wheel ramps and the rear wheels on jack stands to access the fuel filter easily. The fuel filter is located directly above the rear differential, on top of the fuel tank, towards the inside of the car.
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Removing the old filter
To remove the old fuel filter from a 99 Ford Mustang, you must first relieve the fuel pressure. This can be done by removing the gas cap, or by unplugging the electrical connector from the fuel cut-off switch, which is located in the trunk on the driver's side. Then, start the vehicle and let it run until it dies.
Next, you will need to lift the car high enough to access the fuel filter. Place the jack in front of the differential and slowly raise the rear axle. Once the car is at the desired height, place two jack stands on the rear axle and lower the car onto them to secure it.
With the car in the air and the fuel system depressurized, you can now crawl under the car and remove the old fuel filter. It is located directly above the rear differential.
To remove the fuel filter, first remove the two plastic end covers by simply pulling them off by hand. Then, undo the screw securing the filter. Now, remove the fuel line from both sides using a quick disconnect tool. Push the tool firmly into the connector to release the two clips inside, then pull the filter and line apart. Have a rag handy, as gas will start to come out.
Once the fuel lines have been removed from both sides, you can pull the fuel filter off of its mount and remove it from the car. Place the old fuel filter in a safe container to dispose of the gas inside.
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Installing the new filter
To install a new fuel filter in a 99 Ford Mustang, you will need a jack and jack stands to lift the car, a quick disconnect tool, and a new fuel filter.
Before installing the new filter, it is important to depressurize the fuel system. If you skip this step, pressurized gas will spray everywhere when you disconnect the fuel filter. You can do this via an inertia switch in the trunk on the driver's side. Remove the panel by undoing the plastic connector and pulling back on the cloth liner. With the car running, unplug the inertia switch connector. The car will run for a few seconds and then shut off.
Now, lift the car with the front wheels on wheel ramps and the back wheels on jack stands, making it level. Place the jack in front of the differential and raise the rear axle slowly. When the car reaches the desired height, place two jack stands on the rear axle and lower the car onto them to secure it.
Now, you can install the new fuel filter. First, slide the new filter into place. Then, tighten the clamp/retaining bracket and slide the hoses back into place. Finally, use the supplied plastic retaining clips to secure the lines into the Mustang fuel filter.
The new filter will have an arrow pointing in the direction of fuel flow. It should go from the passenger side to the driver's side of the car. You can also refer to the old filter for orientation.
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